<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            width: 400px;
            height: 400px;

            background-image: url(../../../HTML/图片/10.png);
            /* background-repeat: no-repeat; */
            /* background-repeat: repeat; */
            /* background-repeat: repeat-x; */
            background-repeat: repeat-y;
        }
    </style>
</head>

<body>
    <div>div标签</div>
</body>

</html>